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(No Model.) I

G. L. BOTTUM.

STEAM BOILER.

No. 352,513. Patented Nov. 16, 1886.

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GEORGE LANDON BOTTUM, OF COHOES, NEW YORK, ASSIGNOR TO MARGARET A. BOTTUM, OF SAME PLACE.

STEAM-BOILER.

SPECEFICATION forming part of Letters Patent No. 352,513, dated November 16, 1886.

Application filed November 23, 1885. Serial No. 183,659. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE LANDON Bo'r- TUM, of the city of Cohoes, county of Albany, State of New York, have invented new and useful Improvements in Steam Boilers, of which the following is a specification.

My invention relates to certain improvements upon that class of steam-boilers which are made with horizontally-arranged tubular fiues, the object and purpose of my invention being to improvesubsisting constructions in the art; and my improvements therefore consist in the novel construction of parts and their combination, as will be hereinafter fully described, and specifically pointed out in the claim made hereto.

Accompanying this specification, to form a part of it, there is a sheet of drawings containing three figures illustrating my invention, with the same designations of parts by letterreference used in all of them.

Of these illustrations, Figure 1 is a perspective of a steam-boiler containing my in vention, it being shown in connection with the exit-flue, its fire-bed,' and setting, with the walls of the latter shown as in part broken out to illustrate the relative situation of interiorly placed and connected parts, arrows being used to indicate the movement and direction of the heat evolved from the fire. Fig. 2 is a longitudinal vertical and central section of the steam-boiler shown at Fig. 1.

The several parts of the steam-boiler and its connections thus illustrated are designated by letter-reference, and the function of the parts is described as follows:

The letter B designates the boiler, and ethe ear-plates, which are attached to its sides, and are anchored within the side walls of its setting to suspend it.

The letters T. and T designate the end tubesheets, and S the boiler-shell.

The letters t indicate an upper series of hotair tubes that are horizontally arranged in the shell S, and 13" indicates a lower series of tubes that are also arranged within said shell horizontally. a

The letters A designate an area in the end tube-sheets where there are no tubes, this horizontally-extended part of the boiler without tubes being indicated at I in Fig. 2, and shown as located between the upper and lower series of tubes.

1 The letter F designates the fire-bed, G the grate, and W the walls in which the boiler is set, they being shown as in part broken out. 7 The letter M designates the bridge, Y the combustion-chamber, and R its throat for the passage of the products of combustion therefrom.

Theletter J designates a rear vertical flue that is back of the boiler, and the letter N indicates a plate or partition that transversely divides off this fiue into an upper part, at, and a lower part, m", the latter connecting by means of the throat R with the combustionchamber Y, and being in communication with the rear ends of the lower series of tubes, 1?, and the'upper part, m, of this rear vertical flue, J, connecting with the rear ends of the tubes 15 of the upper series.

The letter D designates a front vertical flue with which both series of tubes connect at their front ends.

The letters (1 designate doors placed on the front vertical fine for access thereto.

The letters t indicate water-tubes extended rearwardly from the boiler into the space at of the flue J, so as to be below the plate or partition N. These tubes are for the purpose of increasing the heating-surface of the boiler, and arein communication therewith.

The operation of the parts thus described is as follows: A fire being kindled on the grate, as the heat is evolved therefrom it rises to fill the combustion-chamber under the draft influence of the chimney, and is drawn into and through the lower part of the rear vertical flue, and from thence to pass into andthrough the lower series of tubes into' the front vertical flue, D, from which, under the same con tinued impulse, it passes into and through the upper series of tubes into the upper part of the rear vertical fine, at, from whence itpasses to the chimney, thus making in its passage a complete return-circulation through the boiler, and which, in connection with the heat applied directly to the shell, greatly increases the evaporating capacity of the boiler.

Having thus described my invention, what. I

Signed at Troy, New York, this 22d day of IO October, 1885, and in the presence of the two witnesses whose names are hereto written.

GEORGE LANDON BOTTUM.

Witnesses:

N. E. HOGAN, CHARLES S. BRINTNALL. 

